Copy node.tpl.php to node-downloads.tpl.php

Just as we copied page.tpl.php to page-downloads.tpl.php, we need to do the same for the node.tpl.php file.  Actually, the modification is very minor and easy to miss.  In the first div, change the name of the class from "node" to "downloads-node".  In other words, change the line from

<div id="node-<?php print $node->nid; ?>" class="node<?php if ($sticky) { print ' sticky'; } ?><?php if (!$status) { print ' node-unpublished'; } ?>">

to

<div id="node-<?php print $node->nid; ?>" class="downloads-node downloads-node-<?php print $zebra; ?><?php if ($sticky) { print ' sticky'; } ?><?php if (!$status) { print ' node-unpublished'; } ?>">

 This will let us theme the body of the node. Note the

downloads-node-<?php print $zebra; ?>

in the modified line.  This will allow you to alternate the background colors of even/odd nodes if you'd like.